1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5 * use this file except in compliance with the License. You may obtain a copy of
6 * the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations under
14 * the License.
15 */
16
17package android.text;
18
19import android.test.suitebuilder.annotation.SmallTest;
20import android.util.Log;
21
22import junit.framework.TestCase;
23
24/**
25 * Quick check of native bidi implementation.
26 */
27public class StaticLayoutBidiTest extends TestCase {
28
29    public static final int REQ_DL = 2; // Layout.DIR_REQUEST_DEFAULT_LTR;
30    public static final int REQ_DR = -2; // Layout.DIR_REQUEST_DEFAULT_RTL;
31    public static final int REQ_L = 1; // Layout.DIR_REQUEST_LTR;
32    public static final int REQ_R = -1; // Layout.DIR_REQUEST_RTL;
33    public static final int L = Layout.DIR_LEFT_TO_RIGHT;
34    public static final int R = Layout.DIR_RIGHT_TO_LEFT;
35
36    public static final String SP = " ";
37    public static final String ALEF = "\u05d0";
38    public static final String BET = "\u05d1";
39    public static final String GIMEL = "\u05d2";
40    public static final String DALET = "\u05d3";
41
42    //@SmallTest
43    public void testAllLtr() {
44        expectNativeBidi(REQ_DL, "a test", "000000", L);
45    }
46
47    //@SmallTest
48    public void testLtrRtl() {
49        expectNativeBidi(REQ_DL, "abc " + ALEF + BET + GIMEL, "0000111", L);
50    }
51
52    //@SmallTest
53    public void testAllRtl() {
54        expectNativeBidi(REQ_DL, ALEF + SP + ALEF + BET + GIMEL + DALET, "111111", R);
55    }
56
57    //@SmallTest
58    public void testRtlLtr() {
59        expectNativeBidi(REQ_DL,  ALEF + BET + GIMEL + " abc", "1111222", R);
60    }
61
62    //@SmallTest
63    public void testRAllLtr() {
64        expectNativeBidi(REQ_R, "a test", "222222", R);
65    }
66
67    //@SmallTest
68    public void testRLtrRtl() {
69        expectNativeBidi(REQ_R, "abc " + ALEF + BET + GIMEL, "2221111", R);
70    }
71
72    //@SmallTest
73    public void testLAllRtl() {
74        expectNativeBidi(REQ_L, ALEF + SP + ALEF + BET + GIMEL + DALET, "111111", L);
75    }
76
77    //@SmallTest
78    public void testLRtlLtr() {
79        expectNativeBidi(REQ_DL,  ALEF + BET + GIMEL + " abc", "1111222", R);
80    }
81
82    //@SmallTest
83    public void testNativeBidi() {
84        expectNativeBidi(REQ_L,  ALEF + BET + GIMEL + " abc", "1110000", L);
85    }
86
87    private void expectNativeBidi(int dir, String text,
88            String expectedLevels, int expectedDir) {
89        char[] chs = text.toCharArray();
90        int n = chs.length;
91        byte[] chInfo = new byte[n];
92
93        int resultDir = AndroidBidi.bidi(dir, chs, chInfo, n, false);
94
95        {
96            StringBuilder sb = new StringBuilder("info:");
97            for (int i = 0; i < n; ++i) {
98                sb.append(" ").append(String.valueOf(chInfo[i]));
99            }
100            Log.i("BIDI", sb.toString());
101        }
102
103        char[] resultLevelChars = new char[n];
104        for (int i = 0; i < n; ++i) {
105            resultLevelChars[i] = (char)('0' + chInfo[i]);
106        }
107        String resultLevels = new String(resultLevelChars);
108        assertEquals("direction", expectedDir, resultDir);
109        assertEquals("levels", expectedLevels, resultLevels);
110    }
111}
112